首页|Skin Doses on the Lens for Temporomandibular Joint Exam in Cone Beam Computed Tomography

Skin Doses on the Lens for Temporomandibular Joint Exam in Cone Beam Computed Tomography

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  • NSTL
  • Inst Tecnologia Parana
The aim of this study was to evaluate the kerma at the surface of the lens in TMJ CBCT and to derive the equivalent dose. An anthropomorphic phantom of the head and neck manufactured by Radiation Support Devices (model RS-230) was used. The dosimetric measurements were obtained by using fourteen thermoluminescent dosimetry (TLD) dosimeters (LiF: Mg, Ti), divided in two pairs (one pair for each eye) and positioned on the surface of the phantom, per scanner evaluated. The tomographic images were acquired in three types of CBCT equipment (CS 9000, Gendex GXCB 500 and i-CAT). Values of equivalent dose obtained were: 5.82 mSv (CS 9000); 5.38 mSv (Gendex GXCB 500) and 7.98 mSv (i-CAT), which varied in accordance with the scanner and the exposure factors used in the image acquisition. The Gendex GXCB 500 used larger FOV and higher kV, resulting in levels close to those obtained on the CS 9000, while larger doses were associated with the i-CAT. The dose values associated with TMJ radiological procedures should be performed with awareness and appropriateness due to sensitivity of the lens.

cone beam computed tomographytemporomandibular jointradiation dosimetry

Linhares de Oliveira, Marcus Vinicius、Almeida Andrade, Marcos Ely、Batista, Wilson Otto、Flores Campos, Paulo Sergio

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Univ Fed Bahia, Inst Ciencias Saude, Salvador, BA, Brazil

Univ Fed Pernambuco, Ctr Tecnol, Dept Energia Nucl, Recife, PE, Brazil

Inst Fed Bahia, Dept Tecnol Saude & Biol, Salvador, BA, Brazil

Univ Fed Bahia, Fac Odontol, Dept Radiol Oral, Salvador, BA, Brazil

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2015

10.1590/S1516-89132015060233

Brazilian Archives of Biology and Technology

Brazilian Archives of Biology and Technology

SCI
ISSN：1516-8913
年,卷(期)：2015.58(6)
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